Abstract: A new and improved control system for monitoring and controlling the operation of a downhole linear d.c. motor-pump assembly and a method of using it for producing a sufficient reciprocating pumping action to lift well fluid through the producing tubing of a well to the ground surface. The system includes a surface monitoring station that is in radio communication with a plurality of remote downhole motor-pump assemblies. Each motor-pump assembly has a surface motor controller, a downhole motor-pump cartridge unit that is adapted to be received in a downhole cartridge sleeve assembly that maintains the cartridge unit in a stationary position for pumping purposes. The motor-pump cartridge unit may be raised or lowered by a control cable within the production tubing for helping to facilitate the repair or replacement of the motor-pump cartridge unit.

Abstract: For a metering vibrating pump in a variable flow rate condition, a system and a device is provided for supplying desired liquid quantities comprising a memory circuit (36) set by a supply or energization starting signal (38), a counter (24) counting a certain pump stroke number detected by a piston position detector (12) for detecting the position of a piston in the pump, a numerical comparator (28) comparing the numbers emitted by the counter (24) with preset numbers formed by a numerical digital combinator (32) for outputting a reset signal for the memory circuit (36); the memory circuit (36) starts the pump operation when it is set and stops the operation when it is reset.

Abstract: This invention relates to an automobile grease suction machine, particularly denoting a portable automobile grease suction machine assembled by a sealed type of motor which uses the motor car's own battery as its power source, a sealed type of gear pump box, a rotating shaft connecting link, a suction joint, a suction tube and a lubricant discharger. The presentation of a structure of a simplified vacuum oil suction machine featured for a diminished volume, convenient for application and conveyance and being free from the limitation of the place and time of application are regarded as its objects.

Abstract: The barrel pump has at the lower end of its housing wall a sliding sleeve which--in the open position--exposes the inlet openings at the lower end of the housing wall and--in the closed position--in which it rests against a base plate, closes these inlet openings. The base plate projects in the radial direction beyond the housing wall and, consequently, closes the pump from below. Penetration by the liquid can, hence, only occur through the inlet openings provided on the periphery of the housing wall of the pump. Displacement of the sliding sleeve takes place in that at the underside of the sliding sleeve pressure pieces are provided, which in the close position project beyond the base plate downward and upon the pump being placed down due to the weight of the pump acting downward are displaced upward against the action of a spring acting on the sliding sleeve which frees the sliding sleeve from its sealing contact on the base plate and, consequently, permits entrance of the liquid through the inlet openings.

Abstract: A portable rechargeable battery-operated slender tubular blower for removing relatively light debris from hard surfaces such as sidewalks, driveways, decks or workbench surfaces. The blower uses an axial flow blower fan arranged for noise minimization and energy efficient operation. Blower tube inlet and outlet portions are arranged for debris removal effectiveness by optimizing airflow volume and velocity parameters.

Abstract: Battery powered vacuum unit, useful for suction filtration of water samples in the field. The vacuum unit comprises a miniature piston type air suction pump, driven by a small direct current (DC) motor which in turn is powered by a battery or other 12 volt DC power source. The motor may be controlled by a timer. The motor has a maximum power requirement of about 75 Watts and the suction pump has the ability to produce a vacuum of at least about 12.5 mm of mercury. The entire unit is preferably self-contained in a single housing, and preferably weighs no more than about 5 kilograms (11 pounds).

Abstract: A multiple channel medication infusion system is disclosed which has a plurality of disposable pump cassettes mounted on a single main pump unit, thereby making the system compact and resulting in an economic system. The system has a printer which may be connected to the main pump unit to provide a printed record of system operation. Several modes are accessible to set up and program the system, to monitor actual system performance, and to test the system or display warnings indicating system malfunctions or that new cassettes should be installed.

Abstract: An improved portable compressor kit for use with motor vehicles including a detachable light. The compressor kit has an electrical cord which is plugged into the cigarette lighter socket of a vehicle. The case is wired so that it supplies electricity to the compressor held by the case and also to a light held by the case. The light may be unplugged from its connection with the case as may be the conductor which leads from the cigarette lighter socket, and this conductor may then be plugged into the removable light to provide a portable light.

Abstract: A fire booster device is provided and consists of a portable air blower with an elongated hollow extension sleeve to guide forced air directly onto a source of a fire. In a modification the extension sleeve is movable and adjustable thereon for greater mobility of the device.

Abstract: A water well and storage tank control system for use in isolated areas that utilizes a solar power source in conjunction with pneumatic pump apparatus for lifting well from a well bore hole for surface deposit in a storage tank. A solar power panel functions to continually charge into a storage battery which, in turn, is periodically applicable to energize a pump/compressor to generate air at increased pressure for conduction down the well bore. An airjet chamber immersed beneath the water level in the well bore receives input of the air at increased pressure and evacuates well water upward through a delivery pipe to a surface storage tank.

Abstract: A pump assembly has a housing with water admitting openings through the housing near the bottom. A pump in the housing has an intake near the bottom. A water level sensor connects the pump to a battery in the housing when the level rises above the pump intake, to operate the pump. Closed cell foam flotation floats the assembly to permit pumping from a pool of any depth greater than one third the height of the housing. Flotation also is arranged to achieve self-righting of the assembly in the event of inadvertent tipping or upset.

Abstract: A portable air pump assembly and detachable safety lamp, includes an air compressor; an air supply line supplying pressurized air from the air compressor to a tire; an electrical supply line supplying current to the air compressor; electrical contacts which connect the electrical supply line to the air compressor only when they are in a closed condition; a by-pass air supply line having one end with the air compressor; a pressure limit switch connected with the opposite end of the by-pass air supply line for automatically causing termination of the current supply to the air compressor in response to back pressure from the tire when the tire has been inflated to a desired air pressure; and a safety lamp detachably connected with the housing for providing a warning light and operable in a connected or detached position.

Abstract: A device for dispensing a viscous fluid from and charging a viscous fluid into a canister mounted on a housing of the device is disclosed. The device comprises a reversible auger-type pump including an auger having first and second ends. The first end of the auger is in communication with a nozzle conduit for conducting a viscous fluid between the first end of the auger and a nozzle provided on the nozzle conduit. The second end of the auger is in communication with the canister. The device further includes a motor and associated gearing for connecting the motor to the auger in driving relationship. Power cell means are provided to supply current to the motor. The polarity of the current so supplied is controllable by a switch so that, when current of a given polarity is supplied to the motor, the auger will rotate in a first direction to fill the canister and when the polarity of the current is reversed, the auger will rotate in the opposite direction to dispense from the canister.

Abstract: A self-contained, solar powered unit predominately used for watering livestock. Fundamentally, the preferred embodiment of the unit is an integrated combination which utilizes a solar collecting panel to generate electricity for powering a fluid pump that pumps fluid into a reservoir tank. The reservoir tank, further, supplies fluid to an adjoined watering trough for access by livestock. The unit is simple, compact, and thus, highly portable while its operation is economical and requires little maintenance.

Abstract: A hand-held blower includes a tubular housing having a cavity, an open end and peripheral air inlets spaced from the open end. A dividing wall in the housing cavity separates the cavity into a forward and a rear compartment, the forward compartment having a motor and a fan mounted on the motor, and the rear compartment having a rechargeable power supply electrically connected to the motor. Actuating means electrically connects and disconnects the rechargeable power supply and the motor and a charging jack electrically connected to the rechargeable power supply is provided for connecting the power supply to an external power source.

Abstract: Coaxial, two-cylindered air compressor, more specifically an air compressor capable of continuous air exhausting and air feeding, has a cylinder provided at either end of a main frame; to the underside of the main frame is extended a link so that serves to displace pistons in both cylinders, that by the provision of a crank pin both are fitted by articulation to the shaft side of a crank case, so as to facilitate engagement of the motor on top of the main frame with reduction gears on the upper side of the shaft lever by means of transmission gears on the shaft center, thereby setting the crank case to rotation, so that both of the cylinders may exhaust and suck air in a continuous manner, thereby reducing airfeeding, and airsucking time.

Abstract: A pneumatic pump has provision for being driven by a conventional electric hand drill and chuck that are un-modified so that they can be detached by loosening the chuck jaws and used for other purposes. The provision includes first and second input shafts protruding at right angles to each other and connected by a bevel gear on each. In addition to improving drive access, to provide a choice of drive ratios, the bevel gears have different diameters. The rotary output of the shaft and bevel gear arrangement drives a reciprocating piston in a cylinder that, in association with check valves and a hose connection, can inflate a pneumatic tire, at a speed and to a pressure, determined by which drive ratio is chosen. The drill can be freely swiveled about either input shaft to which attached. A gauge indicates cylinder pressure. A frame permits the assembly of drive and pump to be used to pressurize a tank for storage of compressed air.

Abstract: Variable stroke pump apparatus includes a photovoltaic array for providing electrical current to motors, one of which provides for the pumping action of a walking beam, one of which provides for movement of a control unit which varies the length of stroke of the pumping apparatus from a minimum of zero to a maximum, and one of which operates a counterweight for moving the counterweight in response to the pumping load. The apparatus includes mechanical elements which adjust the length of the stroke of the pumping arm, and a control system which controls the length of the pumping stroke in response to the output of the photovoltaic array.

Abstract: A standby aquarium pump is disclosed which contains a direct current power supply and relay means which will automatically connect this power supply to start the standby pump when alternating current power is interrupted causing the AC powered pump to stop operating. An alternate embodiment provides rectified alternating current as the normal power supply and the direct current power as a standby or auxiliary power source. A rotary direct current motor is employed to drive a reciprocating piston type air pump using an operating rod eccentrically mounted in a flywheel mounted on the motor drive shaft. Electric shock hazard is reduced by containing all 120 volt alternating current connections in a separate housing secured to the main housing. Thus, the main housing can safely be opened to install or replace the batteries by the user who will be exposed only to the low voltage direct current elements.

Abstract: A portable air pump has a housing formed with internal walls that partition two compartments, one of which is accessible from ambience through a door. A flexible air hose is compactly stowed in the accessible compartment and connected with an air compressor housed in the other compartment for extension to ambience. A recharger with flexible wiring is also stowed within the accessible compartment adjacent the flexible air hose.

Abstract: An adjustable automatically controlled pneumatic pump device includes an air pump, an electric motor adapted for being energized by a power source to drive the air pump, an air hose member with an exhaust port at one end, and an other end of the hose member connected to the air pump, a pressure gauge with a pressure setting pointer which can be adjusted in advance according to the predetermined air pressure desired and a pressure indicating pointer which is capable of contacting with the pressure setting pointer when the air pressure through the air hose reaches the predetermined air pressure, and an electric logic circuit device which is electrically associated with the motor and the pressure gauge and arranged in that the electric logic circuit can control the motor for pumping air into an enclosed space.

Abstract: An emergency fuel priming and supply system for engines using a fuel pump and portable fuel can, or pressurized fuel container, for feeding fuel under pressure through a fuel priming line to and through the fuel transfer pump of a diesel (or other fuel) fuel feed system. With one of the alternate approaches the vehicle fuel tank line would be normally disconnected and the emergency fuel line attached for forcing fuel to and through the fuel transfer pump to the engine fuel distribution system. On one approach the fuel priming pump includes clip-ended power lines for convenient connection to a twelve volt battery, or a chargeable power drive tool is used for driving the fuel priming pump. An alternate approach uses a valved pressurized fuel container for forcing fuel to and through the fuel transfer pump.

Abstract: A well pumping unit for use in association with an oil well, water well or the like having a downhole pump operated by a reciprocating pump rod with the pumping unit including a pair of large diameter rotatable wheels independently supported from upstanding supports on a deck, platform or skid with the wheels being interconnected by a pin to which a cable for operating the pump rod is attached. The cable is entrained over a series of pulleys and anchored to a supporting structure with one of the pulleys being a traveling pulley having a cable attached thereto extending over a head pulley and connected with the pump rod for reciprocating the pump rod when the wheels are rotated. The pin interconnecting the wheels is received in one of a plurality of radially spaced pairs of openings to enable the stroke of the pump to be varied by varying the radial position of the pin in relation to the rotational axis of the wheels.

Abstract: A direct current operated bailer pump which utilizes battery power to winch up, while recovering the energy generated by the motor acting as a generator during the downward movement of the bailer to recharge the battery. A sensing circuit senses when the bailer contacts the surface of the oil by monitoring the generated voltage from the motor. A voltage drop corresponds to the sudden decrease in velocity as the bailer encounters the surface of the oil in the well. A dynamic brake is connected to the motor, after a set time period, to decrease the down speed of the bailer to a predetermined safe speed.

Abstract: An improved pump unit for sampling air that operates at a constant air flow rate in the range of 5-5000 cc/min.

Abstract: A portable battery powered blower apparatus for fanning charcoal or other fuel is disclosed and includes a compact two-section, hollow housing including an upright body, and a barrel projecting from an upper portion of the body. The body is internally divided into a lower battery receiving compartment, an intermediate blower receiving chamber separated into side-by-side turbine and fan motor chambers, and an upper air flow transition region. A curved tubular conduit carries air from the turbine chamber and through the air flow transition region and to the free end of the barrel. The barrel is provided with internal reinforcing ribs which support the tubular conduit. Also, first and second lips project downwardly from the end of the barrel to engage a rim of a fuel container. The base of the housing is flared and abuts the side wall of the fuel container to position the apparatus for use.

Abstract: A useful dry battery driven liquid pump for pumping liquid such as kerosene or the like into a tank for an oil heater or the like very conveniently includes a combination of a motor and a liquid pump disposed at the lower end part of a suction tube, a plurality of dry cells contained in a dry battery casing, a liquid surface level detector disposed at the lower end part of a delivery tube and a control circuit which controls operation of the liquid pump properly in response to an output from the liquid surface level detector. The liquid surface level detector includes a prism formed at the lower end of a cylindrical detector body, a light beam generating element and a light beam receiving element. The liquid pump is driven as long as the prism does not get wet with liquid and thus light is reflected from the inner optical surface of the prism toward the light beam receiving element.

Abstract: A portable power device, light and fan including a chassis provided with a light, electric receptacle and switch structure, together with a motor fan unit forming a blower received in a housing supported from the chassis for pivotal movement about a tansverse axis with the blower housing including an outlet oriented above the portion of the chassis having the light, electrical receptacle and switch structure with the outlet in the blower housing being rotatable in a vertical plane about the pivot axis connecting the blower housing to the chassis. A carrying handle is attached to or otherwise provided on the assembly to facilitate its portability. The connection between the blower housing and chassis is uniquely formed by a venturi forming flange on each side wall of the chassis extending into and being closely received in an air inlet in each end wall of the blower housing, thereby forming air inlets for the blower housing and also pivotally supporting the blower housing from the chassis.

Abstract: A portable handyman's device containing a combination of independently operated electrical services such as an electrical outlet, light and fan in which the fan air outlet can be adjusted such that outlet air can be directed in any position between the horizontal and vertical. The fan is a conventional squirrel cage blower which is mounted for movement on the frame of the device by a slidable washer assembly movable within a track placed in the frame. The incorporation of a handle allows the combination device to be carried and used in working areas that lack air circulation and easy access to light and electricity.

Abstract: A device for the intermittent pulsatory application of fluid medicaments, particular for the application of LH-RH for initiating ovulation in women having hypothalamic and hyperprolactinamic amenorrhea. Said device has a reservoir for the medicament and a hose connected to said reservoir for delivering said medicament to a patient, which reservoir and which hose are a prefabricated unit which can be inserted into the device and removed when the content of the reservoir is exhausted. Furthermore, said device has a roller-type pump acting onto said hose when it is stretched onto the needle-like rollers of said roller-type pump, and a D.C. motor for driving said pump and further control means for controlling said motor, said control means having a timer for pulse and pause times so that the motor is energized only for short periods not longer than several minutes while it is between each two of such running periods stopped for more than one hour. At least one battery is provided as energy source for the D.C.

Abstract: The invention is an improved air test means in kit form that is portable and, additionally, includes a complete system arrangement for a plurality of modes of use. The portable kit is self contained for compressing air with a built-in power supply means. The system includes a high pressure test means, and a facility for storage of auxiliary equipment. The system, in addition to the built-in power supply means, has provisions for convenient operation from an external power supply means of comparable voltage output or for support power to preserve the built-in power supply means. Means are provided for convenient recharging of the built-in power supply means and for the attachment and use of auxiliary equipment such as a portable light means. The kit housing is provided with a safety vent for the power supply means and an automatic shut-off means if the kit is closed without first stopping the operating mechanism.

Abstract: The unit comprises a casing in the form of a portable box in which there are contained a pneumatic compressor and an electric motor for driving the compressor. The motor is a low voltage d.c. motor and in the casing there is also contained a transformer - rectifier combination for supplying both the motor and low voltage external utilizers. The shaft of the electric motor extends perpendicular to a wall of the casing and has, at an end accessible through an opening in this wall, a power take-off connectable to a mechanical utilizer. The shaft of the compressor is coaxial to the shaft of the motor and is coupled to the latter by means of a clutch. There are provided means for disengaging the clutch to prevent the shaft of the compressor being turned by the motor shaft when a mechanical utilizer is coupled to the power take off.

Abstract: An apparatus and method having a first unit for creating mechanical movement with a certain frequency ofmovement. A second unit is operatively associated with the first unit for producing a pulsing electrical signal that has a pulse rate substantially proportional to the frequency of movement. A third unit is operatively associated with the second unit for producing a pneumatic signal that is substantially proportional to the pulse rate of the pulsing electrical signal.

Abstract: A smoke detector testing device includes a housing, an impeller rotatably mounted in the housing, and means for rotating the impeller. The housing has a port opening into the housing for receiving the unlit end of a cigarette and an elongated hollow tube extending from the housing for discharging smoke therefrom when the impeller is operated thereby to project smoke to a remote location adjacent a smoke detector mounted on the ceiling of a room or the like.

Abstract: A hand-held, battery-powered dispenser for pumpable materials such as lubricants and, in particular, lubricating grease, comprising a handle, a head, a barrel secured to the head holding a supply of lubricant and a plunger slideable within a bore in the head. The bore intersects an inlet port in communication with the barrel and is in communication with an outlet port for the delivery of the lubricant under pressure. The plunger is reciprocated in the bore through a pressure stroke and a return stroke by a motor in the handle operating a drive mechanism in the head connected to the plunger. The user operates the motor by actuating a switch in the handle which completes a circuit connecting rechargeable batteries in the handle with the motor. A flywheel in the drive mechanism permits significant reductions in the size and weight of the motor and batteries so that the dispenser can be light enough and small enough to be hand-held during operation, yet capable of delivering the lubricant under high pressure.

Abstract: A flat roof solar powered auxiliary drain system having master and satellite modules with respective drain lines and electric pumps for charging the drain lines for syphoning standing water from a flat roof, the master module having a battery and a solar cell for charging the battery for supplying power for operating the electric pumps and a control circuit for selectively energizing the electric pumps for removing standing water.

Abstract: A smoke diffusing device for distributing aromatic smoke from burning material, such as tobacco, incense, or the like, throughout a room comprises a housing having a receptacle thereon for holding burning material, a fan chamber within the housing into which the smoke is drawn from the receptacle through an inlet passage and from which it is forcibly expelled to atmosphere through an outlet passage by a small switch-operated battery-powered motor-driven fan located in the fan chamber. The fan motor, battery, switch, and necessary electric wiring are removably mounted and detachably interconnected in a main chamber in the housing. The main chamber, fan chamber, inlet passage and receptacle are defined by a cylindrical bore extending inwardly of the housing, and one end of the bore is closed by a removable end cap on which the switch is mounted.

Abstract: A submersible pump with an on/off switch electrically connecting a rechargeable battery to the motor. An upper sealable compartment contains the battery, recharging connections, and switch with inward projections to position the battery, a recharging receptacle for the battery on the top of the upper compartment, a resilient cover sealing the switch while permitting actuation of the switch from outside of the upper compartment, and a cap sealing the recharging receptacle. A lower compartment houses the motor, pumping chamber, and impeller. A bullet-shaped shell is seated in the lower compartment with a sealing ring between the shell and lower compartment. The motor is disposed in the shell with the motor drive shaft projecting through an opening in the tip of the shell and another seal surrounds the drive shaft between the motor and tip of the shell.

Abstract: A system for converting compressed air to motive power for generating electricity, a part of the output being used to partially recharge an initial compressed air source, thereby permitting the device to operate for extended periods without an external source of energy.

Abstract: Hydraulic surge protection is provided in a pumping plant by providing a synchronous motor/generator connected across the electrical power bus lines used to energize the motor operated pumps for pumping liquid through a pipeline. A fly wheel is provided on the synchronous motor/generator having an inertia to maintain the motor/generator operating in the event of an electrical power failure between the bus lines and source of electrical energy to generate and feed current to the pump drive motors through the bus lines to maintain pumping operation thereof. This pumping operation is maintained a sufficient length of time to minimize separation of the liquid column being pumped in the pipeline to an extent that damaging water hammer is prevented.

Abstract: A pump such as a vehicle air conditioner compressor has a compressor shaft, a continuously engine-driven flywheel and means such as an electromagnetic clutch for selectively coupling the flywheel to the shaft to operate the pump. The flywheel also provides a permanent magnet field which field rotates with the flywheel and induces in the windings of a relatively stationary annular stator assembly an electric voltage in response to the rotating magnetic field. The pump shaft, annular clutch actuating coil, annular stator assembly, and permanent magnet flywheel are all generally concentrically disposed and in the order stated. The flywheel is driven any time that the engine is running thereby inducing a voltage in the stator windings and that flywheel also drives the exemplary compressor when the clutch is actuated.

Abstract: An improved chemical dosimeter for individual use which collects on a filter particles or vapors present in an air stream which is being pumped through the dosimeter at a constant rate, the improvement is the use ofA variable drive pump that is connected to the filter and that is driven by an electric motor and is controlled by a feed back circuit of an integrator and an amplifier and maintains a constant flow of air through the dosimeter;The integrator receives a signal from a pressure switch that detects changes in the flow of the air stream through the dosimeter by a change in a pressure drop of the air which is being pumped through an orifice;The dosimeter is worn by an individual and at the termination of a period of time, such as a work day, the filter is removed and the collected contents are analyzed by conventional techniques such as gas chromatography to determine a level of exposure of the individual using the dosimeter.

Abstract: A mechanically or electrically actuated barbeque blower that may be removably secured to the rolled upper edge of a barbeque fire box or other desired portion of the barbeque unit to generate a draft in a desired direction that is of material assistance in igniting all of the charcoal briquettes in the fire box, as well as maintaining the briquettes in a glowing heat-emitting condition.

Abstract: The open wire grid safety guard enclosure for a fan and its motor is rectangular box-like in shape and is made up of two substantially identical halves.Each half is made from identical cruciform blanks of grid mesh wires with parallel closely spaced wires extending in one direction and connected by more widely spaced cross wires, including marginal cross wires at the ends of the arms of the cross form. The arms of the cross form are bent inwardly of the box form through an angle of about 105.degree. from the planes of the centers of the blank. Hinge means connect the opposed marginal wires along one side edge of the box and are recessed inwardly of the planes of the outer edges of the sides by the angle of the bent arms. Releasable latch means connect other marginal wires at points spaced from the side with the hinge means. A plate welded to the center of one side of the box carries supporting connections to a fan motor and fan blade enclosed in the box.

Abstract: Leakage of fluid is prevented by a negative pressure created in a motor-shaft bearing section by providing means for forcing fluid in the pumping chamber to flow in one direction.

Abstract: The present disclosure is directed to a fluid transfer apparatus of the battery powered type for use in remote locations where conventional power sources such as 110V ac is not available. The apparatus employs a motor driven positive displacement gear pump having supply and discharge lines. The motor is equipped with a reversing switch and battery connection cables.

Abstract: A hand-held hair-dryer comprises a substantially spherical casing containing an electric heating element associated with an impeller driven by an electric motor. The casing comprises first and second hemispherical caps joined together to form a spherical body with at least one our admission opening between the joined edges of the caps. The impeller is arranged for air to be drawn into the casing through the air admission opening, to then pass into contact with the heating element and finally to pass through the impeller for discharge through a radially directed air-ejection nozzle carried by one of the caps. The dimesions of the spherical casing are such that the hair-dryer can be grasped in the palm of the hand.

Abstract: A hair dryer comprises a motor-driven fan mounted in a casing part together with a heating element for heating the air flow generated by the fan and flowing from an air inlet grid structure to an air outlet grid structure on the casing part. This casing part is telescopically mounted within a main casing part whereby the air inlet and outlet grid structures of the first mentioned casing part are covered by the main casing part in the retracted position and are fully exposed in the extended position. A switch controlling the fan and heater element is actuated in response to movement of the first mentioned casing part from the retracted to the extended position of said casing part relative to the main casing part whereby the fan and heater element are energized only in the extended position.

Abstract: A system for the linear control and calibration of the flow of fluid through a pump in which the pump has a linear flow rate-to-fluid propeller speed relationship over a range of flow rates. A DC motor driving the fluid propeller has a linear drive speed-to-armature voltage relationship over a corresponding range of drive speeds. The voltage applied to the armature is regulated DC, the value of which provides an indication of the fluid flow rate. The system has particular utility in portable air pollutant measuring applications where a measured volume of air is pumped through a filter tube filled with a porous solid sorbent which is later subjected to chemical analysis.

Abstract: A pump such as a vehicle air conditioner compressor has a compressor shaft, a continuously engine-driven flywheel and means such as an electromagnetic clutch for selectively coupling the flywheel to the shaft to operate the pump. The flywheel also provides a permanent magnet field which field rotates with the flywheel and induces in the windings of a relatively stationary annular stator assembly an electric voltage in response to the rotating magnetic field. The pump shaft, annular clutch actuating coil, annular stator assembly, and permanent magnet flywheel are all generally concentrically disposed and in the order stated. The flywheel is driven any time that the engine is running thereby inducing a voltage in the stator windings and that flywheel also drives the exemplary compressor when the clutch is actuated.